cheers for all the links & info guys.
it all tells me exactly what i need to know
i have a spare 6M with the bottom end in great nick, do you guys think it'll be worth my while to have rods & crank etc shotpeened & then put my good head on that?
how will the stock internals really hold up?
I've been given the manifold already, and my manual w58 conersion should start soon
with any luck, soon my soarer will go how it sounds it should!